U.S. patent number 10,079,479 [Application Number 15/103,439] was granted by the patent office on 2018-09-18 for module extraction apparatus of high voltage direct current system.
This patent grant is currently assigned to HYOSUNG HEAVY INDUSTRIES CORPORATION. The grantee listed for this patent is HYOSUNG CORPORATION. Invention is credited to Hong-Ju Jung, June-Sung Kim.
United States Patent |
10,079,479 |
Kim , et al. |
September 18, 2018 |
Module extraction apparatus of high voltage direct current
system
Abstract
The present invention relates to a module extraction apparatus
of a high voltage direct current system. In the present invention,
a fixed base (30) is secured to a structure (82), and a sub-module
(10) is mounted on a movable base (60) that slides on the fixed
base (30), thereby enabling the sub-module (10) to be extracted
from the structure (82). The sub-module (10) may be separated into
a power unit (12) and a capacitor unit (24) which may be separately
extracted from the structure (82). A connection support (84) is
connected to the fixed base (30) and installed to protrude toward
the outside of the structure (82), and the tip end of the
connection support (84) extending toward the outside of the
structure (82) is supported by a wire (86). As described above, the
present invention has an advantage of more easily extracting the
module, which is a heavy object, from the structure (82) to carry
out the maintenance thereof.
Inventors: |
Kim; June-Sung (Anyang-si,
KR), Jung; Hong-Ju (Seoul, KR) |
Applicant: |
Name |
City |
State |
Country |
Type |
HYOSUNG CORPORATION |
Seoul |
N/A |
KR |
|
|
Assignee: |
HYOSUNG HEAVY INDUSTRIES
CORPORATION (Seoul, KR)
|
Family
ID: |
53493602 |
Appl.
No.: |
15/103,439 |
Filed: |
December 24, 2014 |
PCT
Filed: |
December 24, 2014 |
PCT No.: |
PCT/KR2014/012861 |
371(c)(1),(2),(4) Date: |
June 10, 2016 |
PCT
Pub. No.: |
WO2015/102306 |
PCT
Pub. Date: |
July 09, 2015 |
Prior Publication Data
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|
|
Document
Identifier |
Publication Date |
|
US 20160294166 A1 |
Oct 6, 2016 |
|
Foreign Application Priority Data
|
|
|
|
|
Dec 30, 2013 [KR] |
|
|
10-2013-0167881 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H02J
1/10 (20130101); H02J 1/00 (20130101); H02M
7/003 (20130101); H02B 11/127 (20130101); H02B
11/173 (20130101); H02J 3/36 (20130101); Y02E
60/60 (20130101) |
Current International
Class: |
H02B
11/127 (20060101); H02M 7/00 (20060101); H02J
1/00 (20060101); H02J 1/10 (20060101); H02J
3/36 (20060101); H02B 11/173 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
|
|
|
|
103354232 |
|
Oct 2013 |
|
CN |
|
06-343267 |
|
Dec 1994 |
|
JP |
|
07-176687 |
|
Jul 1995 |
|
JP |
|
10-2013-0029761 |
|
Mar 2013 |
|
KR |
|
10-1288679 |
|
Jul 2013 |
|
KR |
|
Primary Examiner: Nguyen; Hoa C
Assistant Examiner: Augustin; Christopher L
Attorney, Agent or Firm: Novick, Kim & Lee, PLLC Kim;
Jae Youn
Claims
The invention claimed is:
1. A module extraction apparatus of a high voltage direct current
system for taking out a module composed of a first part and a
second part, which are separable from each other, from a structure
for the high voltage direct current system, the apparatus
comprising: a fixed base having rails that longitudinally extend,
and installed in the structure; a movable base fixing the first
part and the second part and moving along the rails of the fixed
base; and first part rails formed at a front portion of the movable
base and guiding the first part separated from the second part and
moving along both sides of the front portion of the movable base,
wherein fixing holes are formed at the first part rails, and
fasteners inserted in fastening holes at corresponding positions of
the first part are fitted into the fixing holes so that the first
part is fixed to the first part rails.
2. The apparatus of claim 1, wherein the rails are disposed at both
longitudinal sides of the fixed base and have a roller channel
inside so that rollers on the movable base move in the roller
channels.
3. The apparatus of claim 2, wherein guide ribs are formed inside
the roller channels in the longitudinal direction of the roller
channels and are inserted in roller grooves formed around outer
sides of the rollers.
4. The apparatus of claim 1, wherein a fixing plate is formed at a
front end of the fixed base and coupled to a front end member at a
front end of the movable base, and a stopping wall is formed at a
rear end of the fixed base and coupled to a rear end member at a
rear end of the movable base.
5. The apparatus of claim 4, wherein a handle is disposed on the
front end member of the movable base.
6. The apparatus of claim 1, wherein stopper holes are formed at a
side of each of the rails of the fixed base and at corresponding
portions of the movable base so that when the movable base is moved
on the fixed base and the module is slightly taken out, the movable
base is prevented from moving by fitting stoppers into the stopper
holes of the fixed base and the stopper holes of the movable
base.
7. The apparatus of claim 1, wherein the first part is a power unit
and the second part is a capacitor unit in the module.
8. The apparatus of claim 1, wherein in order to take out the
module, an extension bed is mounted in the structure with a first
end fixed close to the fixed base and wires connected at first ends
to a front end of the extension bed are connected at second ends to
the structure to hold the extension bed on a cage of an aerial
ladder.
9. The apparatus of claim 2, wherein the roller channels formed at
the rails at both sides of the fixed base are open toward each
other and the rollers moving along the roller channels are disposed
on outer surfaces of both opposite sides of roller skirts.
10. The apparatus of claim 2, wherein in order to take out the
module, an extension bed is mounted in the structure with a first
end fixed close to the fixed base and wires connected at first ends
to a front end of the extension bed are connected at second ends to
the structure to hold the extension bed on a cage of an aerial
ladder.
11. The apparatus of claim 3, wherein in order to take out the
module, an extension bed is mounted in the structure with a first
end fixed close to the fixed base and wires connected at first ends
to a front end of the extension bed are connected at second ends to
the structure to hold the extension bed on a cage of an aerial
ladder.
12. The apparatus of claim 4, wherein in order to take out the
module, an extension bed is mounted in the structure with a first
end fixed close to the fixed base and wires connected at first ends
to a front end of the extension bed are connected at second ends to
the structure to hold the extension bed on a cage of an aerial
ladder.
13. The apparatus of claim 5, wherein in order to take out the
module, an extension bed is mounted in the structure with a first
end fixed close to the fixed base and wires connected at first ends
to a front end of the extension bed are connected at second ends to
the structure to hold the extension bed on a cage of an aerial
ladder.
14. The apparatus of claim 6, wherein in order to take out the
module, an extension bed is mounted in the structure with a first
end fixed close to the fixed base and wires connected at first ends
to a front end of the extension bed are connected at second ends to
the structure to hold the extension bed on a cage of an aerial
ladder.
15. The apparatus of claim 7, wherein in order to take out the
module, an extension bed is mounted in the structure with a first
end fixed close to the fixed base and wires connected at first ends
to a front end of the extension bed are connected at second ends to
the structure to hold the extension bed on a cage of an aerial
ladder.
Description
TECHNICAL FIELD
The present invention relates to a module extraction apparatus of a
high voltage direct current system and, more particularly, to a
module extraction apparatus of a high voltage direct current system
for extracting a submodule from a structure at a high place to
maintain the submodule.
BACKGROUND ART
A HVDC (High Voltage Direct Current) system supplies power by
converting AC power from a power plant into DC power, transmitting
the DC power, and then inverting the DC power into AC power at a
power receiving point. The HVDC system has a loss of power less
than an AC transmission type, so it has high power transmission
efficiency. Further, the system can improve stability through line
separation and has small inductive disturbance, so it is
advantageous in long-distance power transmission.
The HVDC system is installed in a structure called a converter
module composed of a plurality of submodules stacked 10 meters high
in a plurality of layers. The submodules each weigh 200 kg or more,
so an aerial ladder is needed to maintain the submodules, which is
troublesome. It is difficult to construct an overhead traveling
crane in substation facilities including a converter module, so
aerial ladders are generally used.
It is very dangerous and difficult work to move submodules that are
heavy equipment located in high-rise structures using an aerial
ladder. Aerial ladders are usually operated by hydraulic pressure,
so even if the load capacity is set larger than the weight of a
submodule, a sudden load applied by heavy equipment suddenly
changes the center of gravity of the aerial ladders, thus causing
safety risks.
Further, considering the weight of submodules, it is very difficult
and dangerous for a worker to move the submodules in a structure
using an aerial ladder. In particular, it is difficult and
dangerous to take out a submodule, which is heavy equipment, on an
aerial ladder.
DISCLOSURE
Technical Problem
An object of the present invention is to easily take out modules of
a high voltage direct current system from a structure to maintain
the modules.
Another object of the present invention is to stably take out
modules of high voltage direct current system from a structure and
put the modules on an aerial ladder.
Technical Solution
According to an aspect of the present invention, there is provided
a module extraction apparatus of a high voltage direct current
system for taking a module composed of a first part and a second
part, which are separable from each other, out of a structure for
the high voltage direct current system, the apparatus including: a
fixed base having rails that longitudinally extend, and installed
in the structure; a movable base fixing the first part and the
second part and moving along the rails of the fixed base; and first
part rails formed at a front portion of the movable base and
guiding the first part separated from the second part and moving
along both sides of the front portion of the movable base.
The rails may be disposed at both longitudinal sides of the fixed
base and have a roller channel inside so that rollers on the
movable base move in the roller channels.
Guide ribs may be formed inside the roller channels in the
longitudinal direction of the roller channels and inserted in
roller grooves formed around outer sides of the rollers.
A fixing plate may be formed at a front end of the fixed base and
coupled to a front end member at a front end of the movable base,
and a stopping wall may be formed at a rear end of the fixed base
and coupled to a rear end member at a rear end of the movable
base.
A handle is disposed on the front end member of the movable
base.
Stopper holes may be formed at a side of each of the rails of the
fixed base and at corresponding portions of the movable base so
that when the movable base is moved on the fixed base and the
module is slightly taken out, the movable base is prevented from
moving by fitting stoppers into the stopper holes of the fixed base
and the stopper holes of the movable base.
The first part may be a power unit and the second part may be a
capacitor unit in the module.
Fixing holes may be formed at the first part rails and fasteners
inserted in fastening holes at corresponding positions of the first
part are fitted into the fixing holes so that the first part is
fixed to the first part rails.
In order to take out the module, an extension bed may be mounted in
the structure with a first end fixed close to the fixed base, and
wires connected at first ends to a front end of the extension bed
may be connected at second ends to the structure to hold the
extension bed on a cage of an aerial ladder.
The roller channels formed at the rails at both sides of the fixed
base may be open toward each other and the rollers moving along the
roller channels may be disposed on outer surfaces of both opposite
sides of roller skirts.
Advantageous Effects
It is possible to achieve the following effects from the module
extraction apparatus of a high voltage direct current system
according to the present invention.
According to the present invention, a submodule is mounted on a
movable base that slides on a fixed base fixed in a structure and a
power unit of the submodule is separated from a capacitor unit and
slides on the movable base, so it is possible to easily take the
submodule out of the structure.
Further, a separate extension bed is coupled to the fixed base to
hold a submodule slid out on the movable base on an aerial ladder,
so it is possible to put the submodule on the aerial ladder without
changing the center of gravity of the aerial ladder, and
accordingly, it is possible to more safely take out the submodule
that is heavy equipment.
DESCRIPTION OF DRAWINGS
FIG. 1 is a perspective view showing the configuration of an
embodiment of a module extraction apparatus of a high voltage
direct current system according to the present invention.
FIG. 2 is an exploded perspective view showing the configuration of
an embodiment of the present invention.
FIG. 3 is an exploded perspective view showing a configuration of
an embodiment of the present invention from under the bottom.
FIG. 4 is a partial cross-sectional view showing a main
configuration of an embodiment of the present invention.
FIG. 5 is a perspective view showing a movable base of an
embodiment of the present invention.
FIG. 6 is a view showing the operation of extracting a submodule
using an extraction apparatus of an embodiment of the present
invention.
MODE FOR INVENTION
An embodiment of a module extraction apparatus of a high voltage
direct current system according to the present invention is
described hereafter in detail with reference to the accompanying
drawings. A submodule of modules of a high voltage direct current
system is exemplified herein.
As shown in the figures, the apparatus for extracting submodules of
this embodiment can slide out submodules that are heavy equipment
from their positions for maintenance thereof. The submodule 10 is
largely composed of a power unit 12 and a capacitor unit 24, and in
this embodiment, the power unit 12 of the submodule 10 can be
separated from the capacitor unit 24.
Various power semiconductors and various control boards are in the
power unit 12. A power unit housing 14 forms the external shape of
the power unit 12. In this embodiment, the power unit housing 14
has a substantially hexahedral shape. A display 16 is disposed at
an angle at the front lower end of the power unit housing 14. That
is, the front lower end of the power unit housing 14 is partially
removed at an angle, so the surface is inclined downward. The
display 16 is disposed on the inclined surface so that the state of
the submodule 10 can be seen from the outside. Cooling water
couplers 18 are disposed through the inclined surface, close to the
display 16.
Fastening holes 20 are formed at the lower ends of both sides of
the power unit housing 14 of the power unit 12. The fastening holes
20 are formed at positions corresponding to fixing holes 74 of
power unit rails 72, which will be described below, in order that
separate fasteners are fitted in the fixing holes 74 to fix the
power unit 12 to a movable base 60. Reference numeral `22`
indicates heat dissipation louvers, which allow air to flow between
the inside and outside of the power unit 12.
A plurality of mounting brackets 26 is fastened to the capacitor
unit 24. The mounting brackets 26 are provided for fixing to the
movable base 60, which will be described below. The mounting
brackets 26 are disposed at the upper end and lower end of the
outer sides of the capacitor unit 24.
A plurality of signal connectors 28 is formed on the front of the
capacitor unit 24. Signals and power are transmitted to the power
unit 12 through the signal connectors 28. Six signal connectors 28
are provided in this embodiment, but the number depends on design.
The submodule 10 is installed in a structure 82 shown in FIG.
6.
A configuration for extracting the submodule 10 is described
hereafter. First, a fixed base 30 is fixed on each floor of a
structure 82 that is a fixed facility. The fixed base 30 is shown
in detail in FIGS. 2 and 3 and has a rectangular shape extending in
a direction.
The fixed base 30 is formed by machining a metal plate, for
example, machining a sheet of metal plate into a predetermined
shape using a press. The metal plate of the fixed base 30 becomes a
fixed base body 32. The fixed base body 32 forms the frame of the
fixed base 30.
The rails 34 extend along both sides of the fixed base body 32.
Rollers 66 of the movable base 60, which will be described below,
are guided along the rails 34. Side walls 36 are formed at a side
of each of the rails 34. The side walls 36 longitudinally extend
along both sides of the fixed base body 32. Upper walls 38 extend a
predetermined width perpendicularly from the upper ends of the side
walls 36. The upper walls 38, the side walls 36, and the bottom of
the fixed base body 32 form roller channels 40. The rollers 66 to
be described below move along the roller channels 40. The roller
channels 40 are open to each other at the rails 34 at both
sides.
Guide ribs 42 extending along the roller channel 40 are disposed
inside the roller channels 40. The guide ribs 42 limit the path of
the roller 60 to be described below. The guide ribs 42 are formed
in the shape of a plate extending along the roller channels 40.
A stopping wall 44 is formed at the rear end of the fixed base 30.
The stopping wall 44 is formed perpendicularly at the rear end of
the fixed base body 32 to limit movement of the movable base 60,
which will be described blow, and fix the movable base to the fixed
base 30. A plurality of fastening holes 46 is formed through the
stopping wall 44. Fasteners are fitted in a rear end member 80 of
the movable base 60, which will be described below, through the
fastening holes 46 to fasten the movable base 60 to the fixed base
30.
A fixing plate 48 is formed at the front end of the fixed base 30.
The fixing plate 40 is also formed perpendicularly to the fixed
base body 32. Fastening holes 50 are formed through the fixing
plate 48, so the fasteners inserted through the fastening holes 48
are fitted in the fastening holes 78 of a front end member 76 of
the movable base 60 to be described below.
A stopping wall hole 52 is formed at a side of the upper walls 38
of the rails 34 of the fixed base 30. Stoppers (not shown) are
separably fitted in the stopper holes 52. The stoppers are fitted
in the stopper holes 52 and stopper holes 79 of the movable base
60, which will be described below, in order to prevent the movable
base 60 from freely moving along the rails 34 when the movable base
60, which will be described below, is unfixed from the fixed base
30.
Reference numeral `54` indicates openings of the fixed base body
32. The openings 54 are formed by cutting off portions that are not
necessary for the structure and strength of the fixed base body
32.
The movable base 60 moves along the fixed base 30. The movable base
60 occupies the same area as the fixed base 30 when seen from
above. The movable base body 62 forms the frame of the movable base
60. The movable base body 62 is formed by combining members that
have U-shaped or rectangular cross-sections because the movable
base body 62 needs to be strong enough for supporting the load of
the power unit 10 and the capacitor unit 24.
Roller skirts 64 are formed along both sides of the movable base
body 62. The roller skirts 64 longitudinally extend at both sides
of the movable base body 62 and protrude a predetermined distance
downward from the movable base body 62. The rollers 66 are
rotatably mounted on the roller skirts 64. Three rollers 66 are
disposed on each side, that is, a total of six rollers 66 are
provided in this embodiment. In particular, the rollers 66 are
arranged at the front end, the rear end, and the middle portion in
the longitudinal direction of the roller skirt 64. The rollers 66
are mounted on the outer surfaces of both opposite sides of the
roller skirts 64. This is for allowing the rollers 66 to move in
the roller channels 66 without interference by other parts because
the roller channels 40 are open toward each other.
The rollers 66, as shown in FIG. 4, can rotate about roller shafts
66' disposed in the roller skirts 63. A roller groove 67 is formed
on the outer side of the rollers 66. The roller groove 67 is formed
around the center portion of the outer side of the rollers 66. The
guide ribs 42 of the fixed base 30 are in the roller grooves 67. As
the guide ribs 42 are in the roller grooves 67, an accurate path of
the rollers 66 can be made.
The movable base body 62 has capacitor mounts 68. The capacitor
mounts 68 are two bars transversely coupled to the movable base
body 62. Fastening holes 70 are formed in the capacitor mounts
68.
Power unit rails 72 are formed at the front portion of the movable
base body 62. The power unit rails 72 have an L-shaped
cross-section in this embodiment. The power unit rails 72 guide the
power unit 12 sliding on the movable base 60. Further, the power
unit 12 is fixed to the power rails 72. To this end, fixing holes
74 are formed at the power unit rails 72. One power unit rail 72 is
formed at each side of the front portion of the movable base body
62. This is for guiding both sides of the power unit 12.
The front end member 76 is disposed at the front end of the movable
base body 62 where the power unit rails 72 are disposed. The front
end member 76 is coupled to the fixing plate 48 of the fixed base
30.
To this end, the fastening holes 78 are formed at positions
corresponding to the fastening holes 50 of the fixing plate 48. A
handle 77 is disposed at the front end member 76. The handle 77 is
used for a worker to move the movable base 60 with respect to the
fixed base 30. Obviously, moving the movable base 60 means moving
the submodule 10.
Stopper holes 79 are formed at the movable base body 62. When the
stopper holes 79 are positioned to meet the stopper holes 52 of the
fixed base 30, the stoppers are inserted into the stopper holes 70
so that the movable base 60 is fixed to the fixed base 30.
The rear end member 80 is formed at the rear end of the movable
base body 62. The rear end member 80 is coupled to the stopping
wall 44 of the fixed base 30. To this end, fastening holes (not
shown) are formed at the rear end member 80, at positions
corresponding to the fastening holes 46 of the stopping wall
44.
The fixed base 30 and the movable base 60 that have the
configurations described above are installed on each floor of the
structure 82 shown in FIG. 6. The submodule 10 is mounted on each
of the movable bases 60, so when the movable base 60 slides out on
the fixed base, the submodule 10 can be taken out of the structure
82.
Further, an extension bed 84 is provided in the preset invention so
that the submodule 10 taken out of the structure 82 can be put on a
cage 90 of an aerial ladder 88. The extension bed 84 is installed
with one end fixed close to the fixed base 30 in the structure 82
and the other end protruding from the structure 82. The extension
bed 84 is installed with the top at the same height as the top of
the movable base 60 so that the submodule 10 can be easily taken
out.
The portion protruding from the structure 82 of the extension bed
84 is connected to the structure 82 by wires 86. As shown in FIG.
6, one end of the wire 86 is connected to the front end of the
extension bed 84 and the other end is connected to the structure
82. The wires 86 are installed at an angle and hold the extension
bed 84 to the structure 82.
The extension bed 84 is installed at a height around the chest of a
worker in the cage 90 at the upper end of the aerial ladder 88.
Use of the module extraction apparatus for a high voltage direct
current system according to the present invention having the
configuration described above is described in detail hereafter.
In this embodiment, fixed bases 30 are fixed in the structure 82.
The structure 82 is about 10 m high and has several stories, and a
submodule 10 is installed in each story. To this end, a fixed base
30 is installed in each story of the structure 82.
The movable base 60 is movably mounted on the fixed base 30 and
guided along the rails 34 of the fixed base 30. The submodule 10 is
mounted on the movable base 60. The power unit 12 and the capacitor
unit 24 of the submodule 10 are separable and mounted on the
movable base 60. The power unit 12 is fastened to the movable base
60 by fitting fasteners into fastening holes 20 and the fixing
holes 74 of the power unit rails 72. The capacitor unit 24 is
fastened by fitting fasteners into the mounting holes 70.
The movable base 60 is movably mounted on the fixed base 30 and
then fastened to the fixed base 30. That is, the front end member
76 of the movable base 60 is fastened to the fixing plate 48 of the
fixed base 30 and the rear end member 80 of the movable base 60 is
fastened to the stopper wall 44 of the fixed base 30, whereby the
movable base 60 is fastened and fixed to the fixed base 30.
Accordingly, the submodule 10 is also fixed to the fixed base
30.
A process of taking the submodule 10 out of the structure 82 for
maintenance is described hereafter. First, the extension bed 84 is
mounted in a story of the structure 82 where a desired submodule 10
is located. One end of the extension bed 84 is fixed close to the
fixed base 30, the wires 86 are connected to the other end of the
extension bed 84, and the other ends of the wires 86 are fixed to
the structure.
In order to take out the submodule 10, the movable base 60 is
unfixed from the fixed base 30 and then moved on the fixed base 30.
That is, the front end member 76 and the fixing plate 48 are
separated and the rear end member 80 and the stopping wall 44 are
separated so that the movable base 60 can be moved on the fixed
base 30. Accordingly, the submodule 10 is slightly taken out of the
structure 82.
In order to fully take the submodule 10 out of the structure 82,
the movable base 60 is moved to the front end of the rails 34 of
the fixed base 30 and the submodule 10 is moved along the extension
bed 84, whereby the submodule 10 can be fully taken out and put on
the cage 90 of the aerial ladder 88. Since the extension bed 84
protrudes from the structure 82, the front end of the extension bed
84 extends up to the center of the cage 90. Accordingly, when the
submodule 10 is put on the cage 90, force that makes the aerial
ladder unstable is not applied.
On the other hand, it may be required to repair the entire
submodule 10, but the power unit 12 usually breaks, so only the
power unit 12 is taken out in most cases. In order to separate only
the power unit 12 from the movable base 60, the movable base 60 is
temporarily combined with the fixed base 30. To this end, the
stopper holes 52 of the fixed base 30 are aligned with the stopper
holes 79 of the movable base 60 and then stoppers are fitted into
the stopper holes 52 and 79. Accordingly, the movable base 60 is
temporarily fixed to the fixed base 30.
When the movable base 60 is temporarily fixed to the fixed base 30,
the fasteners that fix the power unit 12 to the power unit rails 72
are separated. After being unfixed from the power unit rails 72,
the power unit 12 is moved along the power unit rails 72. The power
unit 12 moving along the power unit rails 72 is put on the
extension bed 84 and then moved to the cage 90 of the aerial ladder
88. Thereafter, the power unit 12 placed on the cage 90 is moved
down to the ground.
Meanwhile, the power unit 12 or the submodule 10 that has been
repaired is mounted on the movable base 60 in opposite order to the
process described above, the movable base 60 is moved to the fixed
base 30, and then it is fixed to the movable base 30.
The above description is an example that explains the spirit of the
present invention and may be changed and modified in various ways
without departing from the basic features of the present invention
by those skilled in the art. Accordingly, the embodiment described
herein are provided not to limit, but to explain the spirit of the
present invention and the spirit and the scope of the present
invention are not limited by the embodiments. The protective range
of the present disclosure should be construed on the basis of
claims and all the technical spirits in the equivalent range should
be construed as being included in the scope of the right of the
present disclosure.
For reference, although a submodule 10 composed of the power unit
12 and the capacitor unit 24 was exemplified as a module in the
embodiment shown in the figures, it may be considered to replace
the power unit 12 and the capacitor unit 24 with a first part and a
second part, respectively.
Further, although the rollers 66 of the movable base 60 are moved
on the rails 34 of the fixed base 30 in the embodiment described
above, the rollers 66 are not necessary and corresponding portions
of the movable base 60 may be designed to slide on the rails
34.
* * * * *